1. Plant Conservation Unit, Department of Biological Sciences, University of Cape Town, Rondebosch, 7701, South Africa
2. Agricultural Research Council, Plant Health and Protection (ARC-PHP), Private Bag X134, Queenswood, 0121, South Africa
3. Centre for Biological Control, Department of Zoology and Entomology, Rhodes University, P.O. Box 94, Makhanda, 6140, South Africa